eprintid: 45971 rev_number: 9 eprint_status: archive userid: 1903 dir: disk0/00/04/59/71 datestamp: 2017-05-25 12:59:13 lastmod: 2017-05-25 12:59:13 status_changed: 2017-05-25 12:59:13 type: article metadata_visibility: show creators_name: Sanz Pérez, Eugenio creators_name: Rosas Rodrigo, Pablo creators_name: Menéndez Pidal de Navascués, Ignacio title: Drainage and siphoning of a karstic spring: a case study publisher: The National Speleological Society rights: by-nc-nd ispublished: pub subjects: geologia subjects: construccion full_text_status: public abstract: The Fuentetoba Spring, with a mean flow of 210 L s-1, releases the discharge from an aquifer that comprises three hydraulically-connected synclines. The spring has a very irregular flow of between 8 L s-1 and 3,400 L s-1 due to the predominant water circulation that is non-Darcian turbulent flow as an underground torrent in the vadose zone, as well as through well-developed karstic conduits in the phreatic and epiphreatic zones, as attested to by speleological explorations. The long response times to recharge by the Fuentetoba karstic system, seen in the spring´s hydrograph, are controlled by regional factors. Nevertheless, certain responses that have very long time lags under high water conditions might be governed in the final stretch of the flowpath by mechanisms of pressure or siphoning of the floodwave, and perhaps by constrictions or plugs of sediment in the conduits. date_type: published date: 2016-12 publication: Journal of Cave and Karst Studies volume: 78 number: 3 pagerange: 183-197 id_number: 10.4311/2015ES0134 institution: Caminos department: Ingenieria_Terreno refereed: TRUE issn: 1090-6924 official_url: https://caves.org/pub/journal/PDF/v78/cave-78-03-183.pdf citation: Sanz Pérez, Eugenio and Rosas Rodrigo, Pablo and Menéndez Pidal de Navascués, Ignacio (2016). Drainage and siphoning of a karstic spring: a case study. "Journal of Cave and Karst Studies", v. 78 (n. 3); pp. 183-197. ISSN 1090-6924. https://doi.org/10.4311/2015ES0134 . document_url: http://oa.upm.es/45971/1/INVE_MEM_2016_239005.pdf